Ninth Grade (Grade 9) Magnetism and Electricity Questions

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Each device she added to the series circuit increased the total resistance. The voltage had to increase to provide current until it became so high it had to shut down.

Every device she plugged in acted as a new resistor on a parallel circuit. This increased the resistance to the point that there was not enough voltage to power all the devices.

Every device she plugged in acted as a new resistor on a parallel circuit. This would decrease the overall resistance on the parallel circuit and therefore increase the current flowing in the wires. Increasing the current generates more heat in the wire, causing a switch called a "circuit breaker" to open, stopping the flow of current in an attempt to prevent fire.